139877195391 has 6 divisors (see below), whose sum is σ = 202044837800. Its totient is φ = 93251463588.

The previous prime is 139877195387. The next prime is 139877195399. The reversal of 139877195391 is 193591778931.

139877195391 is a `hidden beast` number, since 1 + 3 + 9 + 87 + 7 + 19 + 539 + 1 = 666.

139877195391 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 139877195391 - 2² = 139877195387 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139877195399) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 7770955291 + ... + 7770955308.

Almost surely, 2^139877195391 is an apocalyptic number.

139877195391 is a deficient number, since it is larger than the sum of its proper divisors (62167642409).

139877195391 is a wasteful number, since it uses less digits than its factorization.

139877195391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15541910605 (or 15541910602 counting only the distinct ones).

The product of its digits is 12859560, while the sum is 63.

The spelling of 139877195391 in words is "one hundred thirty-nine billion, eight hundred seventy-seven million, one hundred ninety-five thousand, three hundred ninety-one".